收到 org.springframework.web.servlet.PageNotFound noHandlerFound 错误

Question

我的第一个 spring mvc 应用程序出现 404 错误，遵循了所有配置但没有成功。能否请您帮忙解决一下问题。

    Following is the change:

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>HereWeGo</display-name>


    <display-name>HereWeGo</display-name>
    <servlet>
        <servlet-name>spring-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>spring-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>


</web-app>

spring-调度员-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:tx="http://www.springframework.org/schema/tx" 
    xsi:schemaLocation="
     http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context-4.1.xsd
     http://www.springframework.org/schema/mvc 
     http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
     http://www.springframework.org/schema/tx
     http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

    <mvc:annotation-driven />

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix">
                <value>/WEB-INF/</value>
            </property>
            <property name="suffix">
                <value>.jsp</value>
            </property>
    </bean>

</beans>

HeyThere.java

package com.aditya.spring;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.config.annotation.EnableWebMvc;


@EnableWebMvc

@Controller

public class HeyThere{

      @RequestMapping("/welcome")
      protected ModelAndView handleRequestInternal(){
          ModelAndView modelandview = new ModelAndView("HelloPage");

          modelandview.addObject("welcomeMessage","Hi user, welcome to the first spring mvc application");

          return modelandview;

      }

}

Hello.jsp

<html>
<body>
    <h1>First Spring MVC Application Demo</h1>
    <h2>${welcomeMessage}</h2>
</body>
</html>

在服务器控制台中，我收到以下警告：

org.springframework.web.servlet.PageNotFound noHandlerFound

WARNING: No mapping found for HTTP request with URI [/HereWeGo/] in DispatcherServlet with name 'spring-dispatcher'

我的项目名称是 HereWeGo。

Answer 1

您的配置看起来不错，除了 @EnableWebMvc 注释（特定于 Java 配置）与您的 <mvc:annotation-driven /> 标记相同。（参考此处 EnableWebMvc annotation meaning)

还有这个问题的修复，如评论中所述，应该添加 <context:component-scan base-package="com.aditya.spring" /> spring-dispatcher-servlet.xml 在 <mvc:annotation-driven> 标签之后，用于在 spring 应用程序上下文中注册控制器。

根据您的例外情况，您的控制器映射到 /welcome，因此您应该尝试 localhost:<YourServerPort>/<YourWebAppDeployName>/welcome 进入您的控制器方法并访问您的 jsp-view。

收到 org.springframework.web.servlet.PageNotFound noHandlerFound 错误

Getting org.springframework.web.servlet.PageNotFound noHandlerFound error

java

spring

http-status-code-404